public class StringBufferDemo{
    public static void main(String [] args){
              StringBuffer buffer = new StringBuffer();
              buffer.append('S');
              buffer.append("tringBuffer12345");
             System.out.println(buffer.charAt(1));
             System.out.println(buffer.capacity());
             System.out.println(buffer.indexOf("tringBuffer12345"));
             System.out.println("buffer = " + buffer.toString());
             System.out.println(buffer.length());
          }
}
